577 Ecology
577.5 Ecology of miscellaneous environments
577.54 Desert ecology
577 Sinh thái học
577.5 Sinh thái học các môi trường hỗn hợp
577.54 Sinh thái học sa mạc
577 Ecologia
577.5 Ecologia di ambienti vari
577.54 Ecologia del deserto
Dewey Decimal Classification
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